b) My existing CU (crowded 6-way fusebox with fusewire) is running both a ring and a radial circuit both with 2.5mm wire from the same way. Surely this can't be OK, because the radial circuit isn't protected by the 30A fuse?
c) Is it legal to move the meter board, and anything I should know before doing it? I've got sufficient flex in the incomers to do this, and I only need to shift it sideways a fraction - I've got a 32cm gap for the CU next to it, and need a couple of cm more to fit most 12 way CUs.
d) Is running two equivalently rated circuits on a suitable MCB OK? e.g. 16A MCB with two radial circuits, one for the immersion heater, and one powering a 13A socket for the fridge-freezer? Or do I have to do a diversity calculation before I can do this? I might need to do this if the answer to c) is no!
e) When I change the CU, I will then have 2 lights circuits, immersion heater, cooker, 2 rings, garage, shed, cooker. Is there any possibility that the BCO will then moan that the 60A company fuse is inadequate and I need to get them to improve the supply?
f) Ditto e) but I then want to add an underfloor heating circuit.